21363750518 has 16 divisors (see below), whose sum is σ = 36798805440. Its totient is φ = 9199701000.

The previous prime is 21363750511. The next prime is 21363750563. The reversal of 21363750518 is 81505736312.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21363750511) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 25554308 + ... + 25555143.

It is an arithmetic number, because the mean of its divisors is an integer number (2299925340).

Almost surely, 2^21363750518 is an apocalyptic number.

21363750518 is a deficient number, since it is larger than the sum of its proper divisors (15435054922).

21363750518 is a wasteful number, since it uses less digits than its factorization.

21363750518 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51109483.

The product of its (nonzero) digits is 151200, while the sum is 41.

The spelling of 21363750518 in words is "twenty-one billion, three hundred sixty-three million, seven hundred fifty thousand, five hundred eighteen".